Combating and exterminating of vermin and insect pests



Patented May 20, 1930 NITED STATES PATENT OFFICE.

THR'OIP CHEMICAL COMPANY, INC., YORK NEW YORK, N. YL, A CORPORATION OF NEW COMBATING AND- EXTERMINATING F VEBMIN AND INSEGTQP'ESTS No Drawing. Application: filed. February 1 6, 1928, Serial No. 254,898, and. in GermanyFebr-uary fl,

The present invention relates to an agent for combating andlexterminating of vermin and insect pests by means of molecular addition compounds of furfurol.

It is known that the insecticidal action of furfurol is due to the excellent wetting; properties and the capacity of dissolving; chitin and wax. The fact that furfurol. is: soluble only with difiiculty has however 10 hitherto prevented. its general use and water; such as for ear-- ample furfurol. bisulphite do not exert the.

soluble furfurol derivatives,

desired and essential insecticidal efiects.

In accordance with the present invention water-soluble molecular addition compounds of iurfurol with basic compoundse. g. amines or aliphatic amino alcohols and derivatives thereof, or inorganic salts or mixtures of these compounds are found to beexcellent means for the combating and extermination of vermin, insect eggs, larvae, etc. and possess the great advantage of being miscible with water in all proportions, according to the nature of the molecular addition compound employed. Moreover, in addition to the solubility in water the compounds have the advantage of greater efiiciency contrasted with furfurol itself. The molecular addition compounds of furfurol used for the purpose of 0 my invention generally are prepared by causing the components to react upon each other in molecular quantities.

Thus, the solutions of the addition compounds of furfurol with ethylene-diamine, -triamine, pyridine, acet-aldehyde-annnonia, acetamide, amino-ethyl alcohol, diglycolimine and the like 'or. also with inorganic salts, such as stannic chloride (compare An nalen der -Cl1emie,-vol. 37 6, page 297) and the like are miscible with water in all proportions.

The possibility of employing, instead of the pure amines, the crude products or mixtures as obtained in manufacture or such as are present in the residues from distillations,

constitutes a considerably cheapening and simplification in regard to the production of means for combating and exterminati'ng vermin and insect-pests; moreover other known insecticides or like active: materials can be. added if desired.

My invention will beill-ustrated by the fol-- [owing examples without; being limited: thereto EmampZe 1.-An: aqueous solution contain- 10% of the furfuroh-ethylene diami-ne, molecular addition compound, to which a little resin soap has been added exerts. a very strong insecticidal action in combating: the grain weevil which oflers an extraordinary resistance to such agents.

Example 2.1 cc. of furfurol and 1 cc. of ethylamine are caused to form the molecular addition compound, 3 cc. of a 10% soap solution are added and the whole is diluted with water to 20 cc.

20 grain weevils were subjected. to the solution with the result that after 2 days 4 survived, which moreover were in a strongly narcotized state.

'Eocample 3.-In an analogous manner a solution was prepared from 1 cc. of furfurol, cc. of isobutylol, cc. of ethylene diamine and 3 cc. of a 10% soap solution. 20 grain weevils were treated and all were killed;

I claim 1- 1. AS a new agent for combating and entermlnatlng vermin and insect pests a water soluble molecular addition compound of furfurol.

2. As a new agent for combating and ex- 1 my hand.

KARL DOBMAIER. 

